chore: version the fleet ops scripts (fleet-status, fleet-alert, papers-digest) — unversioned on the mini today

[aarontrowbridge]

Important

Problem — Three production launchd scripts now live ONLY on the mini's disk, hand-maintained, outside any repo: fleet-status.sh (5 min), fleet-alert.sh (transitions → Slack, new 2026-08-18), and the papers-digest daily.sh + frozen-bundle layout under ~/.amico/ops/. The mini's disk failure loses them; there is no review trail for scripts that page humans.

Acceptance Criteria

• Scripts checked into this repo (ops/ alongside scripts/), with the frozen-bundle upgrade pattern documented (copy dist + refresh sha sidecar — the server pattern)
• ~/.amico/ops/ becomes a deploy target (install script or documented copy), not the source of truth
• README note in ops/: what runs where, on what cadence, posting where